Comfort and Convenience
Preferred seating height is a good example: some people want to sit high with a clear view over the bonnet, others lower and more enclosed. Body proportions and long-held habits explain most of that difference.
Safety and Driver Assistance
Before setting off, it is worth locating wipers, lights, demisting and hazard switches while parked. Searching for them later, in rain or heavy traffic, turns a simple adjustment into an unwelcome distraction.
Multimedia and Connectivity
Keeping a phone charged matters most when it is also the navigation device, since mapping drains a battery steadily. A cable suited to the sockets available is worth packing separately from any music or calling arrangement.